EA036096B1 - Composite anchoring body, pipeline connection device using anchoring body, and method for installing same - Google Patents

Abstract

Disclosed are a composite anchoring body (1), a pipeline connection device using the anchoring body (1), and a method for installing same. An elastic body (4) in the composite anchoring body (1) is a straight strip-shaped polyhedron with a wide bottom and a narrow top, wherein a bottom face (41), a left end face (42) and a right end face are all flat faces, the bottom face 41 is an isosceles trapezoid, and a top face (44) is a curved face formed by connecting flat faces in a curvedmanner. A number of racks (2) are embedded, at intervals, in the length L direction of the elastic body (4), and the tooth top direction of sawteeth (21) of the racks is parallel to the long side of each of the flat faces, which are connected to form the curved face. A horizontal face (443) of the elastic body is provided with a plurality of yielding portions (3) uniformly distributed in the length L direction thereof, and one rack (2) is adjacent to at least one of the yielding portions (3) in the width W direction of the elastic body (4). After at least one composite anchoring body (1) is connected end to end to form an annular anchoring body (20), and same is put into an anchoring chamber (11) of a bellmouth (10) of the pipeline connection device, the sawteeth (21) and an outer wall of a socket (13) are engaged. The composite anchoring body (1) and the pipeline connection device are easy to manufacture, convenient to use, have a good anchoring effect and are adapted to pipes of different diameters. The method for installing the pipeline connection device is simple to operate and high efficient.

Description

The technical field to which the invention relates

The present invention relates to a piping connection, in particular to a composite retention fastener used in a piping connection, a pipeline connection device using a retention fastener, and a method for installing the same.

State of the art

To ensure a strong connection, the traditional pipeline joint has a self-locking structure in the joint. The self-locking pipeline joint has a simple design, is easy to install and has wide application in the fields of utilities, oil pumping, gas transportation, etc.

There are two main types of joints, one type with a self-locking ring structure and another type without a self-locking ring structure. A self-locking annular structure can achieve the goal of self-locking the joint by providing a raised self-locking ring in the flared portion of the pipe providing a stop ring in the flare, and tapering the raised self-locking ring to the flaring by means of a stop ring after inserting the flared portion of the pipe into the socket, e.g. disclosed in Chinese Patent No. CN102297297A titled An inserting type pipe connector with an anchoring structure. The disadvantages of this type of tapered joints are that the structure is quite complex, the cost is higher than the cost of a standard pipe, the self-locking ring cannot be manufactured on site, since it is usually made by welding on the part of the pipe that is covered by the socket and the process is quite complicated. and the design is inconvenient when the design of the pipeline is changed, which often results in delays in construction because the pipe cannot be cut off during on-site installation. A structure without a self-locking ring is installed on other structures in order to ensure self-locking. For example, an improved self-locking joint for steel teeth is disclosed in Chinese patent application No. CN1103149A, whereby the steel teeth and resilient body are also separated from the rubber seal ring, a part of the self-locking mechanism is outside the self-locking chamber during operation and is fixed to the end face of the bell with a part elastic element, so that a tensile force is provided to compress the steel teeth on the outer wall of the pipeline. Compared to the self-locking ring design, this design is quite simple and does not require the self-locking ring to be welded, and the process is greatly simplified. However, the tension of the steel teeth is susceptible to external factors, which entails unstable self-locking, moreover, the self-locking structure is a solid ring, the mold is large, the cost is high and it is not easy to manufacture.

Based on this, there is a self-locking ring-free design on the market in which a self-locking connection is achieved by inserting steel teeth into a rubber sealing ring. A clamping mechanism for joining a pipe under pressure described in US Pat. No. 5,269,569 is shown in FIG. 9 and FIG. 10. When the socket portion 3 'of the pipe, inserted into the socket 2', is pulled out, the steel teeth 26 'will be embedded in the outer wall of the socket portion of the pipe 30'. Therefore, the goal of narrowing the bell portion 3 'of the pipe to be pulled out of the bell 2' can be achieved by applying a force between the pipe 30 'and the steel teeth 26'. However, in this type of self-locking joint, the steel teeth 26 'are embedded in the whole O-ring rubber 14', the production process of the rubber sealing ring 14 'is complex and the rigidity is limited by the sealing requirements, so that the implementation of self-locking is generally not ideal, the joint can be performed in a state low pressure and cannot meet the operational requirements of medium and high pressure, which increases the risk of leakage through the joint when water hammer occurs in the operating pipeline. Moreover, in the actual installation process, installers need to insert the entire rubber O-ring 14 'into the corresponding fixing chamber 13', then two or three zigzag curves need to be bent for a generally smooth insertion. At the same time, the presence of the steel teeth 26 'increases the rigidity of the entire O-ring 14', it is difficult to adjust the position of the steel teeth 26 'during the installation process, and many people are often required to complete the installation. Installation takes a long time, the process is complex and it is not easy to ensure the quality of the installation, which leads to wasted labor. In addition, due to the annular structure of the rubber sealing ring 14 ', the volume becomes larger and difficult to accommodate during transportation, resulting in increased transportation costs. In addition, for pipes with different diameters, special molds with appropriate dimensions are needed to produce rubber rings with different diameters, which leads to increased production costs, production organization becomes more complex, and production efficiency is lower.

In addition, Chinese Patent No. CN101044349A also discloses a locking ring, which is a deformation of a structure without a self-locking ring. Taking into account the imperfections of the whole rubber sealing ring, the locking ring consists of a rigid, serrated segment made of hard metal and a connecting piece made of

- 1 036096 made of elastic material. However, since it is manufactured by bonding a metal segment to a resilient segment, the size of the metal segment is so large that it is difficult to process and the production cost increases. In practice, due to the small size of the elastic component, when the outer diameter of the pipeline is at the lower allowable limit, the tension provided by the elastic component is significantly reduced and it is difficult to achieve a self-locking effect. Moreover, the surface of the pipeline often has a certain radian and the metal ring cannot fully attach to the socket, so the contact of the steel teeth with the pipeline cannot be ensured, which also easily leads to failure of the self-locking function.

Brief description of the invention

The technical problem to be solved by the present invention is to provide a composite fixing fixture that is easy to manufacture, easy to use and has a good fixing effect as well as high pressure bearing capacity and is suitable for pipes with different diameters.

The composite retention mount according to the present invention comprises a resilient body and a toothed rack. The elastic body is a straight polyhedron in the form of a strip with a wide bottom surface and a narrow top surface. The bottom surface, the left end surface and the right end surface of the elastic body are flat, the top surface is a curve formed by a zigzag connection between the planes, and the bottom surface is an isosceles trapezoid. The rows of toothed racks are inserted at intervals in the direction of the length L of the resilient body, and the top of the toothed rack teeth is parallel to the long sides of all planes forming the curve. The horizontal surface of the elastic body is provided with a plurality of deformable portions uniformly distributed in the direction of the length L, and one toothed rack is adjacent to at least one of the deformable portions in the direction of the width W of the elastic body.

In the composite anchorage according to the present invention, the deformable portion is a recess or hole extending in the direction of the height H of the elastic body.

In the composite retention mount according to the present invention, the tooth head angle α is 50 to 90 ° and the Shore hardness of the resilient body is 40 to 90 HA.

In the composite retention mount according to the present invention, the tooth head angle α is 65 to 75 ° and the Shore hardness of the resilient body is 55 to 70 HA.

In the composite retention mount according to the present invention, the tooth head angle α is 70 °.

The present invention also provides a pipeline connection device using a composite retention fastener that includes a bell and a portion of the pipe that is covered by the bell. The inner wall of one end of the bell is provided with a recessed retaining chamber and a recessed sealing chamber. A sealing piece is provided in the seal chamber, and an annular retaining fastener formed by at least one of the end-to-end composite retaining fasteners is provided in the retaining chamber. The teeth are located on the radial inner side of the annular retainer and the tops of the teeth face the inner side of the bell. The maximum circumference of the retaining chamber is less than the maximum circumference of the annular retaining fastener, the minimum inner diameter R of the annular retaining fastener is less than the outer diameter r of the part of the pipe covered by the bell, and the teeth mesh with the outer wall of the part of the pipe covered by the bell.

The present invention also provides a method for installing a pipeline connection device, which includes the following steps:

A) placement of the sealing part in the seal chamber;

B) forming an annular retention attachment by pushing at least one of the composite anchors into the anchor chamber end to end, and

C) Gradually inserting the part of the pipe covered by the bell into the bell in the axial direction and compressing the elastic body and the deformable section until the teeth are fully engaged with the outer wall of the bell.

Compared with the prior art, the technical solutions according to the present invention have at least the following beneficial effects.

1. Compared with the traditional self-locking structure, which is a whole ring or a ring of segments made of steel, the composite fixing fastener according to the present application is straight in the form of a strip in production, the production mold is simpler, the mold production is more convenient, the production efficiency of the mold is greatly improved, the production costs are greatly reduced, and even flared pipes of different diameters can be produced with the same mold by only slight adjustment of the length of the composite fix

- 2 036096 fixing or increasing the number of composite fixing fixtures pressed into the fixation chamber, which can significantly improve production efficiency. At the same time, the straight striped composite retainer takes up less space than the traditional ring retainer and is more convenient to transport.

2. The composite fixing fixture is composed of a rack and a resilient body, and the compression force of the resilient case is used so that the rack teeth are attached to the outer wall of the pipe part covered by the bell, the fixing fixture structure is greatly simplified, the stability is improved, and the problem is prevented. insufficient tension provided by the elastic element.

3. For a fixing piece without a deformable section, when the design clearance of the pipe socket is at the maximum or minimum, respectively, the compression force resulting from the compression of the elastic body is very different; especially the installation resistance is very high when the design clearance is the smallest. In the present invention, a deformable portion is provided in a resilient body near the rack, which effectively reduces installation resistance and improves installation efficiency.

4. Composite retaining fasteners are directly pressed into the corresponding retaining chamber during installation to form an end-to-end annular structure so that they can be easily and quickly fixed in the bell instead of additional fasteners and special mounting tools, which ensures effective adhesion of the part of the pipe covered by the bell , and a bell. Moreover, due to the combination of the shape of the annular retainer and the retaining chamber, the annular retainer only performs the function of anchoring in the retaining chamber instead of performing the function of a seal and does not interfere with external factors or other chambers of the bell, so its blocking performance is more stable and reliable and will not weakened due to external factors.

Other details and characteristics of the composite retention fastener, the piping connection device using the retention fastener, and the method of installation thereof in the present invention may be clearly understood by considering the embodiments detailed in conjunction with the drawings.

Brief description of graphic materials

FIG. 1 is a three-dimensional schematic view of a composite retention fastener according to the present invention.

FIG. 2 shows a top view of FIG. 1.

FIG. 3 is a sectional view of the right side of FIG. 1.

FIG. 4 shows a front view of a pipeline connection device according to the present invention in use before inserting a pipe portion covered by a bell.

FIG. 5 is a three-dimensional schematic representation of the annular retention attachment of FIG. 4.

FIG. 6 is a partially enlarged view A of FIG. 4.

FIG. 7 is a front view of a pipe joint device according to the present invention in a secured state after insertion of a pipe portion covered by a bell.

FIG. 8 is a partially enlarged view B of FIG. 7.

FIG. 9 is a schematic view of an existing clamping mechanism for connecting a pressure pipeline in a loose state prior to insertion of a portion of the pipe covered by a bell.

FIG. 10 is a schematic view of an existing clamping mechanism for joining a pressure pipeline in a secured state after insertion of a pipe portion covered by a bell.

Detailed description of the invention

As shown in FIG. 1-3, the composite fixing attachment 1 according to the present invention comprises a resilient body 4, and the Shore hardness of the resilient body 4 is 40 to 90 HA, and preferably 55 to 70 HA, to achieve a proper deformation effect. The elastic body 4 is a straight polyhedron in the form of a strip with a wide lower surface and a narrow upper surface. The bottom surface 41, the left end surface (42) and the right end surface are flat, and the top surface 44 is a curve formed by a zigzag connection between the planes. The bottom surface 41 is an isosceles trapezoid, and the top surface 44 comprises a front connection plane 441 connected to the front edge of the bottom surface 41, a transition plane 442 connected to a front connection plane 441, a horizontal plane 443 connected to a transition plane 442, and a transition slope 444, connected to the horizontal plane 443. The transitional slope 444 is connected to the trailing edge of the lower surface 41 by means of an arc 445. The toothed rack 2 is built into the resilient body 4 from the transition plane 442. The toothed rack 2 is provided with teeth 21, and the tops of the teeth 21 are generally parallel leading and trailing edges of the transition plane

- 3 036096 bones 442. Four toothed racks 2 are inserted at intervals in the direction of the length L of the resilient body 4. Of course, the number of toothed racks 2 can be determined according to the diameter of the socket pipe. When the pipe diameter is larger and the resilient body 4 must be longer, the number of toothed racks 2 must be increased and vice versa, the number of toothed racks 2 must be reduced. Moreover, the plurality of toothed racks 2 may be uniformly or unevenly distributed in the length L direction of the elastic body 4. At the same time, in the length L direction, the plurality of toothed racks 2 may be arranged in a straight line along the long axis (length L direction) of the elastic body 4 or staggered along the long axis. To provide a locking effect, the rack 2 is made of a hard material such as metal, alloy, ceramic or other materials with a similar hardness. The rack 2 in this example is made of steel. The head angle α of the prong 21 is 50 to 90 °, preferably 65 to 75 ° and 70 ° in this example. To provide the effect of engagement with the part of the pipe covered by the bell, three rows of teeth 21 are located in the direction of the width W of the composite retainer 1. The number of rows of teeth 21 can also be increased accordingly according to fastening requirements that are not listed here. The horizontal plane 443 of the elastic body 4 is provided with four deformable portions 3 uniformly distributed in the direction of length L. In the width direction W of the elastic body 4, one rack 2 is disposed adjacent to one deformable portion 3. If necessary, two or more deformable portions 3 may be provided near the rack 2. The deformable portion 3 is a hole extending in the direction of the height H of the resilient body 4. The hole can also deform into a recess extending in the direction of the height H of the resilient body 4. The deformable portion 3 according to the present invention has a simple structure and convenient processing. During the insertion of the bell, the rack 2 moves in the direction of the width W of the elastic body 4 and the deformable portion 3 can be compressed. Thus, the compressive force provided by the elastic body 4 on the rear side of the gear rack 2 will be more stable and the compression force on the gear rack 2 will not suddenly change with a change in the design clearance of the socket pipe in the allowable range, which solves the installation problem when the design the gap of the common self-locking joint is in the lower allowable limit.

As shown in FIG. 4 and 6, in a pipeline joint device (i.e., a self-locking joint) using a composite locking fastener 1, the inner wall of the left end face of the bell 10 is provided with a locking chamber 11 and a sealing chamber 12, which have recesses. The inner wall extends radially and inwardly along the funnel 10 to form an annular spacer shoulder 101. The annular spacer shoulder 101 is located between the fixing chamber 11 and the seal chamber 12 and the seal chamber 12 is provided with a sealing piece 7. As shown in FIG. 5, three composite fixing attachments 1 as shown in FIG. 1, are connected end to end to form an annular locking attachment 20. In particular, the three resilient bodies 4 are bent and then the adjacent surfaces of the left and right ends are connected to form a ring. The teeth 21 are located on the radial inner side of the annular anchor 20. Of course, the annular retainer can also be formed from a single composite retainer with a greater length, in other words, the surfaces of the left and right ends of the elastic body of the composite retainer are connected. The maximum circumference of the above retaining chamber 11 is less than the maximum circumference of the annular retaining attachment 20, and the annular retaining attachment 20 can be positioned in the retaining chamber 11 by compression, deformation and bending to prevent the annular retaining attachment 20 from falling out of the retaining chamber 11. The shape of the annular retaining the attachment 20 matches the shape of the fixing chamber 11. In particular, the resilient body 4 has a wide bottom surface and a narrow top surface, a wider bottom surface 41 and an arc 445 connected to the bottom surface 41 are engaged with the inner wall of the fixing chamber 11, which ensures accuracy installation. If the bottom surface of the resilient body 4 has the same width as the top surface, the compression ratio on the bottom surface is much less than the compression ratio on the top surface after installation, and the annular fixing attachment 20 becomes unstable after installation. To avoid this problem, the resilient body 4 according to the present invention has a design with a wide bottom surface and a narrow top surface, so that the compression state on the top surface and the bottom surface of the resilient body 4 is more suitable, and the left and right ends of two adjacent elastic bodies 4 can be better connected, which is advantageous to form an annular retaining attachment 20 with a stable structure. In order to generate sufficient compressive force on the resilient body 4 when the bell portion 13 of the pipe is inserted, the minimum inner diameter R of the annular retaining attachment 20 is smaller than the outer diameter r of the bell portion 13. The tops of the teeth 21 face the inner side of the bell 10 so that the teeth 21 can firmly engage with the outer wall 131 of the pipe part 13 covered by the bell after inserting the pipe part 13 of the pipe covered by the bell into the bell 10. After

4 036096 of the engagement of the teeth 21 with the outer wall 131, the part 13 of the pipe, covered by the bell, can drive the annular fixing attachment 20 with rotation in the circumferential direction of the bell 10 in the fixing chamber 11 during rotation. In the connecting device according to the present invention, the tooth 21 serves as a locking connection, and the presence of the deformable portion 3 can ensure that the resilient body 4 can be fully compressed during installation, providing sufficient deformable space for the metal rack 2.

A method for installing a pipeline connection device, which includes the following steps:

A) placing the sealing part 7 in the sealing chamber 12;

B) forming an annular retaining attachment 20 by pressing the three composite retaining attachments 1 into the retaining chamber 11 end-to-end;

C) progressively inserting the pipe portion 13, covered by the bell, into the bell 10 in the axial direction, while the resilient body 4 and the deformable portion 3 are compressed and the teeth 21 are fully engaged with the outer wall 131.

As shown in FIG. 7 and 8, the part 13 of the pipe, covered by the bell, is inserted into the bell 10, which was provided with the annular fixing attachment 20 and the sealing piece 7, the deformable portion 3 is compressed, so that the teeth 21 of the rack 2 mesh with the outer wall 131. When the pipe part 13, the bell 10 is pulled out of the bell 10, the teeth 21 are still engaged with the outer wall 131 because the tops of the teeth 21 are inclined towards the inside of the bell 10, thus preventing the bell portion 13 from pulling out and achieving the goal of self-locking of the joint. It can be seen that the pipeline connection device according to the present invention does not need a self-locking ring, quick installation and strong adaptability.

The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made by those skilled in the art should be within the scope of the present invention as defined by the claims.

Practical applicability

The composite fixing fixture and pipeline connection device according to the present invention has the advantages of simple manufacture, convenient use and good fixing effect, and is adapted for pipes with different diameters. The installation method of the pipeline connecting device is easy to operate and has high working efficiency.

Claims (7)

CLAIM 1. Composite fixing mount (1), containing an elastic body (4) and a toothed rack (2), in which the elastic body (4) is a straight polyhedron in the form of a strip with a wide lower surface and a narrow upper surface, and the lower surface (41 ), the surface (42) of the left end and the surface of the right end are flat, and the upper surface (44) is a curve formed by a zigzag connection between the planes, and the lower surface (41) is an isosceles trapezoid, the rows of toothed racks (2) are embedded at intervals in the direction of the length L of the elastic body (4), and the top of the teeth (21) of the gear rack (2) is parallel to the long sides of all planes forming a curve, the horizontal plane (443) of the elastic body (4) is provided with a plurality of deformable sections (3), uniformly distributed in the direction of length L, and one toothed rack (2) is adjacent to at least one of the deformable sections (3) in the direction of width W pack the round body (4). 2. Composite fixing fastener (1) according to claim 1, characterized in that the deformable portion (3) is a recess or hole extending in the direction of the height H of the elastic body (4). 3. Composite fixing attachment (1) according to claim 2, characterized in that the angle a of the tooth head (21) is from 50 to 90 °, and the Shore hardness of the elastic body (4) is from 40 to 90 HA. 4. Composite fixing attachment (1) according to claim 3, characterized in that the angle a of the tooth head (21) is from 65 to 75 °, and the Shore hardness of the elastic body (4) is from 55 to 70 HA. 5. Composite retaining attachment (1) according to claim 4, characterized in that the angle a of the tooth head (21) is 70 °. 6. A pipeline connection device comprising a composite fixing fixture (1) according to any one of claims 1 to 5, a bell (10) and a part (13) of the pipe, covered by a bell, and the inner wall of one end of the bell (10) is provided with a locking chamber (11 ) with a recess and a sealing chamber (12) with a recess, a sealing part (7) is provided in the sealing chamber (12), while an annular retaining fastener (20) formed by at least one of the composite retaining fasteners (1) located end to end, provided in the fixing - 5 036096 in the chamber (11), the teeth (21) are located on the radial inner side of the annular retainer (20), the tops of the teeth (21) are facing the inner side of the bell (10), the maximum circumference of the retaining chamber (11) is less than the maximum circumference of the annular retaining attachment (20), the minimum inner diameter R of the annular retaining attachment (20) is less than the outer diameter r of the pipe part (13) covered by the bell, and the teeth (21) are engaged with the outer wall (131) of the pipe part (13), covered by a bell. 7. A method for installing a pipeline connection device according to claim 6, which includes the following steps: A) placement of the sealing piece (7) in the seal chamber (12); B) forming an annular retaining attachment (20) by pressing at least one of the composite retaining attachments (1) into the retaining chamber (11) end to end; and C) gradual insertion of the pipe part (13), covered by the bell, into the bell (10) in the axial direction, and at the same time the elastic body (4) and the deformable section (3) are compressed until the teeth (21) fully mesh with the outer wall (131 ) part (13) of the pipe, covered by the socket.